A filter device based on diaphragm raw material granulation

Abstract

The application relates to the technical field of screen changers, in particular to a filtering equipment based on diaphragm raw material granulation. The technical scheme comprises a filter piece, an inflow channel, multiple sealing assemblies and an outflow channel, the inflow channel and the outflow channel are arranged on the two sides of the filter piece respectively; the filter piece can rotate around the axis, and a cavity is arranged in the filter piece; at least two sealing assemblies are arranged on the outer periphery of the filter piece at intervals, and one side of the sealing assembly is in abutment with the outer periphery of the filter piece, so as to separate the inflow channel and the outflow channel; the sealing assembly comprises a blocking piece which can move back and forth along the radial direction of the filter piece and a blocking piece, and a channel for removing impurities is arranged in the blocking piece. The technical effect is that the problem that the existing technology needs to stop and change the screen and the pipeline switching is difficult is avoided.

Description

Technical Field

[0001] This invention relates to the field of screen changer technology, and more particularly to a filtration device based on diaphragm raw material granulation. Background Technology

[0002] To reduce costs and achieve resource recycling, in actual production, more and more thin film products (such as lithium battery separators and optical-grade plastics) use recycled plastics as part or all of the raw materials for the film. However, recycled plastics often contain impurities such as carbides and gel particles, making them much more difficult to filter than virgin materials. As the core filtration equipment in the granulation production line, the screen changer intercepts impurities in the melt through the filter screen, becoming a key link in ensuring the cleanliness of recycled materials and realizing high-value reuse. Currently, extrusion systems are mainly equipped with two types of screen changing devices: plate screen changers, which require the extruder to be stopped first, and then the screen inside the screen must be removed and replaced; and hydraulic pull-out screen changers, which change the screen by pushing and pulling left and right, but the screen changing process will cause the extruded material to be interrupted, resulting in production interruption, directly affecting the stability of continuous production, and generating waste. The column-type screen changer with publication number CN219114751U includes a double-column double-station and a hydraulic cylinder mechanism. A double-column sealing mechanism is provided on one side of the double-column double-station, and an integrated sealing frame is installed on one side of the double-column sealing mechanism. The hydraulic cylinder mechanism is located on the side of the integrated sealing frame, and an internal hydraulic rod is installed inside the hydraulic cylinder mechanism. The internal hydraulic rod is connected to the internal column hydraulic cylinder. A leak-proof frame runs through one side of the internal column hydraulic cylinder, and an internal double-screen double-channel mechanism is installed on one side of the leak-proof frame. A screen changing pipe is provided on one side of this mechanism. This design uses a hollow anti-leakage frame that is fitted inside the built-in hydraulic rod and built-in column cylinder to achieve double-net double-channel through-movement, and seals the built-in double-net double-channel mechanism inside the anti-leakage frame, making it easy to replace and disassemble the filter screen; The above technical solution adopts a dual-channel structure, which can maintain equipment operation during network replacement. However, in practical applications, there are still problems such as the need to shut down the equipment for network replacement and difficulties in pipeline switching, which limits the application effect. Summary of the Invention

[0003] The purpose of this invention is to provide a filtration device based on diaphragm raw material granulation, which solves the problems of needing to stop the machine to replace the screen and the difficulty of switching pipelines.

[0004] To achieve this objective, the present invention adopts the following technical solution: a filtration device based on diaphragm raw material granulation, comprising a filter element, an inlet channel, multiple sealing components and an outlet channel, wherein the inlet channel and the outlet channel are respectively disposed on both sides of the filter element; The filter element is capable of rotating around its axis and has a pre-set cavity inside; At least two sealing components are spaced apart on the outer periphery of the filter element, and one side of the sealing component abuts against the outer periphery of the filter element to separate the inlet channel and the outlet channel; The sealing assembly includes a plugging element and a blocking element that can reciprocate along the radial direction of the filter element, and the blocking element has a discharge channel. During operation, the melt in the preset melt channel flows from the inlet channel to the filter element. As it flows, it comes into contact with the filter element, and impurities in the melt are blocked in the area where the filter element and the inlet channel meet.

[0005] Compared with the prior art, the present invention has the following advantages: it avoids the problems of the prior art that require shutdown for network replacement and pipeline switching. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0008] Figure 1 This is a schematic diagram of a filtration device based on diaphragm raw material granulation. Figure 2 This is a first partial structural cross-sectional view of a filtration device based on diaphragm material granulation; Figure 3 An exploded view of a partial structure of a filtration device based on diaphragm material granulation; Figure 4 This is a schematic cross-sectional view of a second partial structure of a filtration device based on diaphragm material granulation. Figure 5 This is a schematic cross-sectional view of a third partial structure of a filtration device based on diaphragm raw material granulation. Figure 6 This is a schematic diagram of the barrier plate structure of a filtration device based on membrane raw material granulation; Figure 7 This is a schematic cross-sectional view of the fourth partial structure of a filtration device based on diaphragm raw material granulation; Figure 8This is a schematic diagram of the first working state of a filtration device based on diaphragm raw material granulation; Figure 9 This is a schematic diagram of the second working state of a filtration device based on diaphragm raw material granulation; Figure 10 This is an exploded view of the filter element structure of a filtration device based on diaphragm raw material granulation.

[0009] Diagram description: Filter element 1, cavity 1a, inlet channel 2, sealing assembly 3, outlet channel 4, assembly housing 5, plugging element 31, barrier element 32, impurity discharge channel 32a. Pressure relief valve 32b Drain valve 321 Barrier plate 6, through hole 61, flushing flow 61a, first channel 21, second channel 22 Support cylinder 11, filter sleeve 12, driving component 13 Pusher 311, sealing block 312 Pressure monitor 7 Axial drive component 8 9. Bracket Inflow zone a, closed zone b, outflow zone c. Detailed Implementation

[0010] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0011] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0012] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Example 1, as Figure 1-10 As shown, This invention provides a filtration device based on diaphragm raw material granulation. The filtration device includes a filter element 1, an inlet channel 2, multiple sealing components 3, and an outlet channel 4. Optionally, in this embodiment, the filter element 1, the inlet channel 2, the multiple sealing components 3 and the outlet channel 4 are all disposed inside the assembly housing 5. The assembly housing 5 is a cuboid or cylindrical shell structure used to provide installation support and protection for each component. The assembly housing 5 has a melt inlet communicating with the inflow channel 2, a melt outlet communicating with the outflow channel 4, and a mounting hole for installing the sealing assembly 3 on opposite sides. like Figures 1-10 As shown, the filter element 1 is disposed inside the assembly housing 5 (when the assembly housing 5 is provided), and it is able to rotate around its own axis. As a preferred structure for filter element 1, such as Figure 10 As shown, the filter element 1 includes a support cylinder 11, a filter sleeve 12, and a drive element 13; The support cylinder 11 is preferably made of 316L stainless steel and has a hollow cylindrical structure. Its two ends are closed by end caps, and an internal cavity 1a is formed. The support cylinder 11 has several through holes evenly distributed around its perimeter. The diameter of the through holes is 2mm to 5mm to ensure that the melt can smoothly enter the cavity 1a. The filter sleeve 12 has a cylindrical structure with a mesh size of 20μm to 100μm and a thickness of 0.5mm to 1.5mm. The filter sleeve 12 is fitted onto the outer periphery of the support cylinder 11 with an interference fit to ensure that it does not slide relative to the support cylinder 11 when it rotates. The circumferential surface of the filter sleeve 12 forms a dense gap structure to intercept impurities in the melt. The driving component 13 includes a motor 131 (the motor 131 is equipped with a reducer). The motor 131 is a servo motor or a frequency converter. Its output shaft is fixedly connected to one end of the support cylinder 11 through a coupling. When the motor 131 is working, it drives the support cylinder 11 to rotate around its axis. The support cylinder 11 synchronously drives the filter sleeve 12 to rotate. like Figure 5 As shown, the inflow channel 2 is disposed inside the assembly housing 5 (when the assembly housing 5 is provided), one end of which is connected to the melt inlet of the assembly housing 5, and the other end faces the outer periphery of the filter element 1, for guiding the melt to the filter element 1. The outflow channel 4 is located inside the assembly housing 5 (when the assembly housing 5 is provided), with one end facing the outer periphery of the filter element 1 and the other end connected to the melt outlet of the assembly housing 5, for exporting the filtered melt. The inflow channel 2 and the outflow channel 4 are located on both sides of the filter element 1, and are respectively connected to the corresponding side of the outer periphery of the filter element 1; like Figure 5As shown, this embodiment includes two sealing components 3, which are spaced apart on the outer periphery of the filter element 1. One side of the sealing component 3 abuts against the outer periphery of the filter element 1 to separate the inlet channel 2 and the outlet channel 4. like Figure 7 and Figure 8 As shown, the sealing assembly 3 includes a sealing component 31 and a blocking component 32; and the blocking component 32 is a block structure, made of tool steel or hard alloy, and is fixed to the inner wall of the assembly housing 5 by bolts (when the assembly housing 5 is provided). The side of the barrier 32 facing the filter element 1 is machined into an arc surface that matches the curvature of the outer periphery of the filter element 1, so as to fit the outer periphery of the filter element 1. The barrier 32 has a debris discharge channel 32a inside. The channel is preferably rectangular in cross-section. One end of the channel opens onto the arc side of the barrier 32 to receive debris, and the other end extends to the outer wall of the barrier 32. Among them, such as Figure 5 As shown, the area where the circumference of filter element 1 contacts the inlet channel 2 is the inflow area a; the area where the circumference of filter element 1 contacts the sealing element 31 is the closed area b; and the area where the circumference of filter element 1 contacts the outlet channel 4 is the outflow area c. The specific working process of this device is as follows: During operation, the inlet channel 2 is connected to the preset melt channel, and the outlet channel 4 is connected to the preset extrusion equipment. The melt in the preset melt channel flows from the inlet channel 2 to the filter element 1 and contacts the outer periphery of the filter element 1. Impurities in the melt are blocked in the area where the outer periphery of the filter element 1 meets the inlet channel 2, i.e., blocked in the inlet area a; while the pure melt enters the cavity 1a through the through holes of the filter sleeve 12 and the support cylinder 11, and then is discharged from the cavity 1a through the outlet area c, and flows to the preset extrusion equipment through the outlet channel 4. However, in practical applications, the existing technology requires frequent shutdowns to replace the filter screen, meaning that the filter sleeve 12 also needs to be replaced frequently, which disrupts the workflow. Therefore, this device is also equipped with a sealing component 3, such as Figure 8 As shown, when it is necessary to clean the impurities attached to the inflow area a on the outer periphery of filter element 1, When the drive unit 13 is activated, it causes the filter element 1 to rotate clockwise. At the same time, the push unit 311 at the corresponding position starts to work, causing the sealing block 312 to move away from the filter element 1. At this time, the closed area b is opened. On the one hand, the impurities adhering to the inflow zone a are driven to the closed zone b by the rotation of the filter element 1, and come into contact with the arc edge of the barrier element 32. As a result, the impurities are scraped off and fall into the impurity discharge channel 32a. On the other hand, when the sealing block 312 moves to open the closed area b, the impurity discharge channel 32a opens, and the melt in the cavity 1a pushes the impurities into the impurity discharge channel 32a under pressure, and washes away the impurities attached to the outer periphery of the filter element 1 during the flow process. As filter element 1 continues to rotate, the clean surface that was previously located in the outflow zone c gradually moves to the inflow zone a and continues to perform filtration, thus achieving immediate cleaning of filter element 1. Thus, this device only needs to be equipped with one filter element 1 to achieve continuous filtration and online cleaning of molten impurities. When the impurities attached to the outer periphery of the filter element 1 are removed, its clean surface can be immediately transferred to the filtration station to continue the filtration work. There is no need to stop the machine to replace the filter screen, nor is there a need to set up a dual-column alternating switching structure. Compared to existing technologies that require stopping the machine to remove the built-in column for filter replacement, this device avoids production interruptions and waste generation caused by machine downtime. Compared to the dual-column alternating screen changer, which is prone to melt pressure fluctuations and unstable discharge during pipeline switching, this device maintains a stable connection between the inlet channel 2 and the outlet channel 4 during the cleaning process through the rotation of a single filter element 1 and the cooperation of the sealing component 3, without the need for pipeline switching, thus effectively avoiding the impact of pressure fluctuations on extrusion quality. In summary, this device overcomes the problems of existing technologies that require shutdown to replace the filter screen during the screen replacement process, as well as the pressure fluctuations and switching difficulties that occur when switching pipelines in the dual-column alternating structure.

[0014] Example 2, as Figures 2-8 As shown, this embodiment further defines the connection relationship between the sealing member 31 and the blocking member 32 based on embodiment 1; like Figure 7 As shown, in this embodiment, the sealing member 31 and the blocking member 32 adopt an interference fit; specifically, when the sealing member 31 is in the extended state, the arc surface of the sealing block 312 and the arc surface of the blocking member 32 together form a continuous sealing surface, thereby blocking the open side of the discharge channel 32a. Furthermore, a pressure relief valve 32b is provided on the side of the barrier member 32 relative to the sealing member 31 (i.e. the side of the barrier member 32 away from the filter element 1). The pressure relief valve 32b is a one-way valve with an opening pressure of 0.1MPa to 0.3MPa. It is used to balance the pressure in the impurity discharge channel 32a when the sealing member 31 retracts, and to prevent impurities from flowing back to the outer periphery of the filter element 1. During operation, when the sealing element 31 extends, the sealing block 312 and the barrier element 32 jointly seal the impurity discharge channel 32a, ensuring the sealing between the inflow channel 2 and the outflow channel 4; when the sealing element 31 retracts, the sealing block 312 disengages from the barrier element 32, the impurity discharge channel 32a opens, and the pressure relief valve 32b opens under negative pressure, creating a stable negative pressure environment in the impurity discharge channel 32a to assist in the smooth discharge of impurities.

[0015] Example 3, based on Example 2, further defines the specific structure of the sealing component 31. like Figure 8 As shown, in this embodiment, the sealing member 31 includes a pushing member 311 and a sealing block 312; The pusher 311 is a double-acting cylinder or a double-acting hydraulic cylinder. Its cylinder body is fixed to the outer wall of the assembly housing 5 (when the assembly housing 5 is provided) or fixed to the external mounting base. Its piston rod passes through the side wall of the assembly housing 5 (when the assembly housing 5 is provided) and connects to the sealing block 312 to drive the sealing block 312 to reciprocate along the radial direction of the filter element 1. The sealing block 312 is a rectangular block structure. The side facing the filter element 1 is machined into an arc surface that matches the curvature of the outer periphery of the filter element 1. The radius of the arc surface matches the outer diameter of the filter element 1. The sealing block 312 abuts against the outer periphery of the filter element 1 on the side opposite to the working part of the pusher 311 (i.e., the arc side). When the pusher 311 is in the extended state, the sealing block 312 forms a line contact seal with the outer periphery of the filter element 1, thereby blocking the melt path extending from the inflow channel 2 to the outflow area c and preventing unfiltered melt from flowing into the outflow channel 4.

[0016] Example 4: Based on Example 3, this example further defines the drainage structure of the barrier 32; like Figures 7-8 As shown, in this embodiment, the discharge channel 32a of the barrier 32 is an "I" shaped channel or an arc-shaped channel. Taking the "I" shaped channel as an example, its vertical section opens on the arc side of the barrier 32, and the opening width is 5mm to 10mm. Its horizontal section extends to the side wall of the barrier 32. Furthermore, the drain valve 321 is disposed on one side of the barrier 32, and its valve body passes through one side wall of the barrier 32 by means of threaded connection, and is connected to the horizontal section outlet of the impurity discharge channel 32a, for controlling the timing of impurity discharge, and the temperature resistance rating is not lower than 300℃. The sealing element 31 contacts one end of the drain valve 321. Specifically, when the sealing element 31 is in the retracted state, the side wall of the sealing block 312 abuts against the valve stem contact of the drain valve 321, so that the drain valve 321 is in the ready-to-open state. During operation, when the sealing component 31 retracts and moves, the impurity discharge channel 32a is connected to the drain valve 321. When the sealing component 31 is fully retracted, the drain valve 321 opens periodically, with each opening lasting 0.5s to 2s, to discharge the impurity melt in the impurity discharge channel 32a in batches, so as to avoid a large amount of impurities being discharged at once and causing pipeline blockage.

[0017] Example 5: Based on Example 4, this device further includes a barrier sheet 6; like Figures 6-8 As shown, this embodiment also includes a barrier plate 6, which is made of wear-resistant stainless steel (such as 304 stainless steel or 316L stainless steel) and is fixed to the inner wall of the inflow channel 2 by bolts. With the axial extension direction of the filter element 1 as the perspective, the barrier 6 divides the inflow channel 2 into a second channel 22 on the side closer to the filter element 1 and a first channel 21 on the side farther away from the filter element 1. The second channel 22 is adjacent to the inflow area a of the filter element 1 and is used to contain blocked impurities; the first channel 21 is connected to the melt source and is used to provide clean flushing melt. The barrier sheet 6 has a plurality of obliquely arranged through holes 61 (with a diameter of 3mm to 8mm) evenly distributed on it. The axis of the through holes 61 forms an angle of 30° to 60° with the radial direction of the filter element 1, and the tilting direction is consistent with the rotation direction of the filter element 1 (in this embodiment, when the filter element 1 rotates clockwise, the through holes 61 also tilt clockwise). Because the melt itself is highly viscous, the adhesion between impurities and the filter screen surface will cause the centrifugal force of the rotation of the filter element 1 to be unable to effectively move the impurities on its surface, resulting in the impurities remaining on the outer periphery of the filter element 1. In this embodiment, the setting of the barrier plate 6 forms a directional flushing flow when cleaning impurities. Specifically, during operation, when the sealing component 31 retracts to open the closed area b, a negative pressure (approximately -0.05 MPa to -0.1 MPa) is formed in the impurity discharge channel 32a. Under the action of the negative pressure, the melt in the first channel 21 flows rapidly through the through hole 61. Since the through hole 61 is obliquely set, the flow velocity of the melt increases (2 m / s to 5 m / s) after passing through the through hole 61, forming a flow velocity such as... Figure 8 As shown, the flushing flow 61a along the rotation direction of the filter element 1 directly impacts the outer periphery of the filter element 1 in a tangential direction, flushing and peeling off the impurities attached to the outer periphery of the filter sleeve 12, and carrying the impurities into the impurity discharge channel 32a, thereby effectively removing the impurities from the filter element 1.

[0018] Example 6: Based on Example 5, this embodiment further includes a pressure monitor 7. like Figure 4 and Figure 7As shown, the pressure monitor 7 (pressure sensor, pressure transmitter, etc.) has a range of 0MPa to 20MPa and is installed on the side wall of the assembly housing 5 via a threaded connection (when the assembly housing 5 is installed). The detection end of the pressure monitor 7 is located in the inlet channel 2 and is used to monitor the melt pressure in the inlet channel 2 in real time. The driving component 13 and the pushing component 311 of the filter element 1 are both connected to the pressure monitor 7. The communication connection method can be a wired connection (such as RS485 bus) or a wireless connection (such as Bluetooth or Wi-Fi) to achieve bidirectional signal transmission. When the pressure monitor 7 detects that the pressure in the inlet channel 2 exceeds the preset threshold, it indicates that the impurities attached to the outer periphery of the filter sleeve 12 have accumulated to the point of affecting the filtration efficiency. The preset threshold can be set according to the melt properties and filtration accuracy (for example, set to 10MPa to 15MPa, or set to 1.5 to 2 times the initial working pressure). When the pressure exceeds the preset threshold, the pressure monitor 7 sends a signal to the drive unit 13 and the pusher 311. The drive unit 13 starts to rotate the filter element 1, and the pusher 311 retracts to disengage the sealing block 312 from the filter element 1 to clean impurities. After cleaning, the pressure in the inflow channel 2 drops to the normal range, and the pressure monitor 7 sends a signal again, causing the drive component 13 to stop and the push component 311 to extend, and the equipment resumes normal filtration operation. Through the above automatic control, the automated operation of the filtration equipment is realized, eliminating the need for manual judgment of the cleaning time and improving production efficiency and equipment operation stability.

[0019] Example 7 further defines the structure of the axial drive component 8, the slide rail 132, and the bracket 9 based on Example 6; like Figure 9 As shown, this embodiment also includes an axial drive component 8, which is selected from electric push rods or hydraulic cylinders. Its cylinder body is fixed to one side of the assembly housing 5 (when the assembly housing 5 is provided), and its working end is fixedly connected to one end of the support cylinder 11, for driving the filter element 1 to reciprocate along its axis. The stroke of the axial drive 8 should be sufficient to allow the filter element 1 to protrude completely from the outside of the assembly housing 5; A slide rail 132 is fixedly connected to one side of the motor 131 of the drive component 13. The slide rail 132 is a linear guide or a dovetail guide, and its sliding direction is consistent with the axial direction of the filter element 1. The rotating part of the motor 131 is connected to one end of the support cylinder 11 through a coupling. The slide rail 132 is fixedly connected to one side of the housing of the motor 131 by bolts. A bracket 9 is fixedly installed on one side of the assembly housing 5. The bracket 9 is an L-shaped bracket or a U-shaped bracket. The vertical section of the bracket 9 is fixedly connected to the assembly housing 5 by bolts, and the horizontal section of the bracket 9 is slidably connected to the slider of the slide rail 132. The mounting height of the housing 5 can be adjusted by the bracket 9 to adapt to the equipment layout of different production lines. When the filter element 1 needs maintenance or inspection, the axial drive 8 operates, pushing the support cylinder 11 to move outward along its axis. At this time, the motor 131 moves together with the support cylinder 11, and the slide rail 132 slides along the bracket 9, thereby causing the entire filter element 1 to protrude outside the assembly housing 5, making it convenient for staff to replace, inspect or clean the filter sleeve 12. After maintenance is completed, the axial drive 8 reverses its operation to reset the filter element 1 to the working position.

[0020] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filtration device based on diaphragm raw material granulation, characterized in that, It includes a filter element (1), an inlet channel (2), multiple sealing components (3) and an outlet channel (4), wherein the inlet channel (2) and the outlet channel (4) are respectively disposed on both sides of the filter element (1); The filter element (1) is capable of rotating about its axis and has a pre-set cavity (1a) inside. At least two of the sealing components (3) are spaced apart on the outer periphery of the filter element (1), and one side of the sealing component (3) abuts against the outer periphery of the filter element (1) to separate the inflow channel (2) and the outflow channel (4). The sealing assembly (3) includes a plugging member (31) and a barrier member (32) that can reciprocate along the radial direction of the filter member (1), and the barrier member (32) has a discharge channel (32a) inside. During operation, the melt in the preset melt channel flows from the inlet channel (2) to the filter element (1), and when it flows, it comes into contact with the filter element (1). Impurities in the melt are blocked in the area where the filter element (1) and the inlet channel (2) meet.

2. The filtration equipment based on diaphragm raw material granulation according to claim 1, characterized in that, The sealing member (31) is press-fitted with the barrier member (32) to block the open side of the discharge channel (32a), and the barrier member (32) is provided with a pressure relief valve (32b) on the side opposite to the sealing member (31).

3. The filtration equipment based on diaphragm raw material granulation according to claim 2, characterized in that, The sealing component (31) includes a pusher (311) and a sealing block (312). The working end of the pusher (311) is connected to one side of the sealing block (312) to drive the sealing block (312) to reciprocate. The sealing block (312) is located away from the working end and abuts against the outer periphery of the filter element (1) to prevent the inflow channel (2) from extending into the outflow channel (4).

4. The filtration equipment based on diaphragm raw material granulation according to claim 3, characterized in that, The barrier (32) is provided with a drain valve (321); The drain valve (321) is disposed on one side of the barrier (32) and penetrates one side wall of the barrier (32), and the sealing member (31) is in contact with one end of the drain valve (321); During operation, the plug (31) moves to connect the discharge channel (32a) with the drain valve (321).

5. The filtration equipment based on diaphragm raw material granulation according to claim 4, characterized in that, The filter element (1) includes a support cylinder (11), a filter sleeve (12), and a drive element (13). The support cylinder (11) is a hollow structure and closed at both ends to form the cavity (1a), and the support cylinder (11) has a number of through holes evenly opened on its circumference. The filter sleeve (12) is fitted around the outer periphery of the support cylinder (11) and completely covers its outer periphery, and the filter sleeve (12) has a dense gap structure. The working part of the drive member (13) is connected to the end of the support cylinder (11) to drive the support cylinder (11) to rotate around its axis.

6. The filtration device based on diaphragm raw material granulation according to any one of claims 1-5, characterized in that, It also includes a barrier sheet (6). The barrier sheet (6) has a plurality of uniformly arranged through holes (61). The barrier sheet (6) is disposed in the inflow channel (2). With the filter element (1) extending along its axis, the barrier sheet (6) divides the inflow channel (2) into a first channel (21) and a second channel (22). Furthermore, the through hole (61) is obliquely arranged so that when the melt flows, a scouring flow (61a) is formed to scour the outer peripheral area of ​​the filter element (1) in the inflow channel (2).

7. The filtration device based on diaphragm raw material granulation according to claim 6, characterized in that, It also includes an assembly housing (5), in which the filter element (1), inlet channel (2), multiple sealing components (3) and outlet channel (4) are all disposed.

8. The filtration device based on diaphragm raw material granulation according to claim 7, characterized in that, It also includes a pressure monitor (7), which is disposed in the assembly housing (5) and its detection end is located in the inflow channel (2).

9. The filtration device based on diaphragm raw material granulation according to claim 5, characterized in that, It also includes an axial drive (8), whose working part is fixedly connected to one end of the support cylinder (11) to drive the filter (1) to move back and forth along its axis.

10. The filtration device based on diaphragm raw material granulation according to claim 5, characterized in that, The drive unit (13) includes a motor (131) and a slide rail (132); The rotating part of the motor (131) is connected to the filter element (1), and a slide rail (132) is fixedly connected to one side of the motor (131).

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